Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c638c9202b7622…

MALICIOUS

PDF

75.4 KB Created: 2021-01-25 11:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 63c7cf54a751dddb712584995231d541 SHA-1: c0bf2bc46ec9b0df85f13b439041e7969d9a4de7 SHA-256: 30c638c9202b7622df89b16eddf06528ce3d093d443d75aa95d573ff26e35ac6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are likely part of a link farm designed to attract users searching for game hacks. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or trojan delivery. While no scripts were directly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/wb?keyword=clash%20of%20clans%20hack%20download%20windows%2010 PDF link annotation
    • http://citruss.space/33051684404hiwem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392860/normal_5ff0a8c38ee3a.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/hj3zzgg/paint_by_numbers_online_for_pc_free.pdfIn PDF document text
    • https://xujikipige.weebly.com/uploads/1/3/1/3/131379844/d34bec13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454678/normal_6001cbbed0c21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449392/normal_6008d3b14bbad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381756/normal_5fce861873c91.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/c3Z3Ygc/digestion_definition_biology_cell.pdfIn PDF document text
    • http://2022god.com/53995703825kd7li.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/cagjgfU/zusalenuritan.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/jeD0hf8/pukuxamewedilaxilip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/eureka_minimal_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/broadcast_tv_guide_phoenix_az.pdfIn PDF document text
    • http://luwefotikejumu.rf.gd/battlefield_4_gameplay_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/bimanual_examination_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/jevavabawezapizuvimo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 5268 bytes
SHA-256: d29e751dd10739089f8e755bb661e7310b461d506858d06b92626c8f024766f7
font_01_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 10472 bytes
SHA-256: aff32f3027fc1e539bdd42560f4738036bc06569a2357ce1374fe436c1340399

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